Default values for 'gas' and 'gasPrice' are different between docs and code

[barakman]

Pretty sure I've reported this before, but unable to find it for some reason...

In the docs:

• gas: Gas limit used for deploys. Default is 4712388.
• gasPrice: Gas price used for deploys. Default is 100000000000 (100 Shannon).

In the code:

  var default_tx_values = {
    gas: 6721975,
    gasPrice: 20000000000, // 20 gwei,
    from: null
  };

This is also true in earlier versions, for example, Truffle 4.1.15:

  var default_tx_values = {
    gas: 6721975,
    gasPrice: 100000000000, // 100 Shannon,
    from: null
  };